Power-hammer die.



THOMAS OTOOLE, OF WESTVILLE, ILLINOIS.

POWER-HAMMER DIE.

To all fwkom it may concern.'

Be 1t known that I, THOMAS OTooLE, a

citizen of-the United States, and resident of lVestville, in the county of Vermilion and State of Illinois,

have invented certain new and useful Improvements in Power-Hamings, to be hereina mer Dies, vof which the following is a specification.

My invention relates to the construction of the dies for steam, trip or similar power hammers having opposed, relatively movable dies, and more particularly to the construction of the opposite' or coacting working faces of such dies. Y i -One object of this invention is the provision of top and bottom dies having coact- `ing working .faces otl` novel construction and having improved means whereby the forging and cutting operations are facilitated in making forgings with such hammers.

Another object of this invention is to pro- Vide a hammer die having anV integral cutting edgev by which metal is severed, and having means adapted to prevent upsetting and conse uent dulling of the so-formed cuting edge y impact of an opposed hammer 1e. e A further object of the invention is to provide power hammer dies having working faces of novel construction adapted to simplify the forging and cutting operations in making mining machine bits or cutters.

A still further object' of my invention is the provision of coacting hammer dies having the novel constructions, arrangements and combination of arts-shown in the drawer described in detail, and to be particularly pointed out in the appended claims.

Referring now to thedravv'ings, forming part of this specification, Figure 1 is an isometric plan, showing the upper or working face of the anvil or bottom die of a: power hammer embodying the novel features of my invention; l

Fig. 2 is' a sectional end-elevation of the die of Fig. 1, in the plane of the line II-II of Fig. 1.

Fig. 3 is a sectional end eleva-tion, similar to that of Fig. 2. the section being taken in the plane of the line III- III of Fig. 1. j

Fig.4 is an inverted isometric plan, showing the lower or working face of the vertically movable top or hammer die of a power hammer, as constructed and arranged in accordance with this invention, the die being Specification of Letters Patent. Application filed February 7, 1918.

theplane of the highly heated 'faces are at one and the cutting edges on,

Patented Sept. 24, 1918.

Serial No. 215,757.

shown. invertedin order to illustrate clearly the Working face of the hammer die.

Fig. 5 is a sectional end elevation of the top or hammer die, in the plane of the line Fig. 6 is a sectional end elevation, similar to that of Fig. 5, the section being taken in line VI-VI of Fig. 4C.

Fig. 7 is a plan showing one forin of mining machine pick or cutter, in the making of which dies embodying my invention as shown and described are particularly adapted for use.

In the accompanying drawings, they anvilor bottom die as a whole, is designated by A, and the coacting relatively movabletop or hammer die by B.

The bottom die A is provided on each side, adjacent to its bottom 2, with notches 3, 3,

which extend longitudinally so as to form a dovetail tongue 4 by which the stationary or fixed die A is `removably secured in place on a suitable base or foundation. T he top die B alsois provided with a notch 5 on each side to form a dovetail tongue 6 adjacent to its 'face 7, by which the die B is removably secured Ito the lower end of the vertically re-` a steam or other,

grooves 10 have vertical side surfaces 1l. 11.

defining the width of the groove and inclined bottom surfaces l2 and 13. these inclined surfaces converging upwardly and intersecting to form an integral cutting edge 14 which is in the plane of the horizontal working faces 8 and 9 of the die.

`When subjected to continuous use for any considerable time interval the dies become and when the plane forging another end of the dies the dies are not unifornily heated. By providing a pair of the transverse grooves 10 two cutting edges are obtained and the plane forging surface is thereby located in the middle of the length iin of the die,or Yin line with the vertical center of the hammer Where the maximum bloiv is obtained.

Byeyalternately using the cutting edges formed by the convergingsnrfaces of the grooves l() andby using the plane flat die surface located between the grooves for the maj or portion of the forging operations, the dies are uniformly heated, Which greatly lessens liability of vbreakage and increases the life of the dies. It will be readily seen that b v having the sloping bottom surfaces 12 and 13 of these grooves intersect in the planeof the top or Working surface of the die, upsetting of the cutting edge or edges 151 by impact of the vertically movable hammer die B, is avoided and prevented in using the hammer dies.

The intermediate portion 8 of the die A has a beveled surface 15 which connects the horizontal upper surface 8 With the vertical side surface 16 on thefront or smiths side of the die. (See Figs. 1 and The Working surface 17,0fthe`upper or hammer die B also is flat and in the same khorizontal plane, exept for a small' portion 18 thereof which is beveled, and which inclines inwardly from the front or smiths side 15) of this die to a point between the side surfaces of the die. The ends 20, 20 of this beveled portion 1S also are beveled (as is clearly shown` in Figs. 4 and 5).

in securing the hammer die B, shown and described, to the piston rod of the hammer, the end Q1 of this die will be placed adjacent to the end` of the bottom or anvil die A; and, of course, the side surfaces 16 and 19 Willboth be on the front or smiths side of the hammer. i

rdinarily the Working faces 8 and 9 and inclined surfaces 12 and 13 of the die A and Working faces 17, 18 of the die B, will be accurately machinedbefore being put into use, and it Will be readily seen that when necessary these faces may be remachind. so as to restore them after long use makes such necessary or desirable.

ln the use of iian'inier dies constructed as shown and described herein, the beveled surface 15 and inclined rface 18 of the tivo dies c act in the fo nations so as ft he eine forged from -irdlv 'when the metal Ich a blow b v the top iding the beveled forging face ,o on me lower surface of the die the forming of the bent, sharpened or cut ting end 21 of picks or ciztters C, such as that shown in Fig. 7 is readily accomplished.

The inclined bottom surfaces 12 of the transferee slots or grooves 10 in the Working face of the bottom die or anvil A may be utilized in some of the forging or forming operations. For example, in forming picks like that shown in Fig. 7, the point of the bent end'24 of the pick C will be provided With a sharp cutting edge 23 which is forged thereon, in themanner shown in Fig. 2, the face 17 of the upper die B coacting with the inclined face 12 and cutting ledge 14 of the die A in producing` the sharp cutting edge, and in this Way making it unnecessary to later sharpen the pick by filing or grinding to complete the pick.

The advantages of my invention will be appreciated by those skilled inthe art.

Modifications in the construction and arrangement. of parts forming the 'working faces of the dies ymay be made without departing from my invention. The integral cutting edges be formed at an end or the ends of the die, and other changes may be made Within the scope of the appended claims.

l claim 1. In a power hammer, a die having a fla-t working face, said die having a transverse groove therein, and the bottom surfaces of said groove being oppositely. inclined and intersecting to form an integral 4cutting edge, with the cutting edge in the planey of the flat upper surfaces of said die, at opposite ends of said cutting edge.

2. In a power hammer, a die having a flat Working face, said die having a pluralityof transverse grooves therein with the bottom surfaces 0f said groovesinclined upwardly and inwardly, and the inclined surfaces of said grooves intersecting to form integral cutting. edges in the plane of the fiat upper surfaces of said die.

3. 1n a power hammer, an anvildie and vcoactinghammer die havingflat- Working faces, the Working face of 'one of said dies having transverse grooves therein, and the bottoms of said transverse grooves being mclmed relatively to the fiat working face of said die to form an integral cutting edge,

and the grooves in theworking face ofthe grooved die being opposite flat portions of the Working face of thev other die. y

4. In a power hammer, a stationary anvil die and an opposite hammer die having flat Working faces, said anvil die having a transverse groove in its working face and said groove having upwardly and inwardly converging bottom surfaces intersecting to form an integralcutting edge and said edge being' in the plane of the flat Working-surfaces of the die. K

n testimony whereof 1 have hereunto set m hand.

y THOMAS OTOOLE. 

